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Notice: Onset will be closed on Monday, May 27th in observance of Memorial Day. Orders and requests submitted after 2pm (ET) on Friday may not be processed or confirmed until Tuesday. From all of us at Onset, we wish you happy Memorial Day!

The HOBO MX2501 pH and Temperature Data Logger is designed for long-term monitoring of pH in estuaries, lakes, streams, rivers, and oceans. Leveraging Bluetooth Low Energy® (BLE) technology, the MX2501 pH Logger communicates wirelessly with the free HOBOmobile® app on iOS and Android devices making logger setup, calibration, and data offload quick and easy. A guided pH calibration process on the HOBOmobile app makes an otherwise complicated process easier to follow. This affordable and compact logger dramatically cuts the time and effort needed to collect field data, while also offering higher resolution data.

NOTE: pH electrodes should always be stored in storage solution when not deployed.

Add Extended Warranty for $69.50/unit?
* This choice will apply to all existing MX2501 in your cartquote request

* Product MX2501 will be added to cart after additional options have been chosen or declined.

Onset’s HOBO MX1102 CO2 logger makes it more convenient than ever to measure and record CO2 in buildings and other non-condensing environments. It measures CO2 from 0 – 5,000 parts per million (ppm) – and our free HOBOmobile app* allows you to access data right from your mobile phone or tablet within a 100-foot range.

The MX1102 also features a USB port so it can be used with a computer running HOBOware graphing and analysis software.

Add Extended Warranty for $59.50/unit?
* This choice will apply to all existing MX1102A in your cartquote request

* Product MX1102A will be added to cart after additional options have been chosen or declined.

The EG4115 Core is a 15-channel energy meter with 0.5% revenue-grade accuracy compliance and the ability to measure residential or commercial circuit panels, up to 3-phase 277/480VAC and 6900A. The meter has HomePlug AV powerline communication, an Ethernet port, and 2 USB ports for additional options, like WiFi. The embedded web server lets you connect to the interface over the internet or on a local area network. Each unit has a data logger that stores up to 64 data points for the lifetime of the hardware, and you can access data as granular as 1-second averages for the most recent hour of recording. The EG4115 Core is an accurate and flexible solution for monitoring multiple circuits in any residential or commercial energy monitoring application.

Add Extended Warranty for $49.90/unit?
* This choice will apply to all existing EG4115 in your cartquote request

* Product EG4115 will be added to cart after additional options have been chosen or declined.

The EG4130 Pro combines an energy meter, data logger, and a web server. This powerful combination lets you measure, store and retrieve (V, A, VAr, kWh, etc.) data directly from the device or from a remote location via the internet. You can view historical and live data for the lifetime of the hardware with the unit’s convenient user interface (UI). Users have access to real-time values, long-term reports, an interactive graphical interface, and many other tools.